Re: [gentoo-user] Laptop Overheat

[J. Roeleveld]

On Tuesday, December 16, 2014 04:16:38 PM Randy Westlund wrote:
> Hey guys,
>
> When I'm compiling something large and close the lid of my laptop (lid
> close events disabled) or leave it on the couch where it can't get
> proper airflow, it tends to overheat and crash.  If I leave it open and
> on a table, everything is fine.
>
> I have a quad-core processor and MAKEOPTS="-j5".  During compilation,
> system load is around 5 and all 4 cores are maxed out.  My CPU temp is
> 99C or under, which is safe for this machine.
>
> dmesg shows this every few minutes whenever my machine is at max temp,
> which I've read is normal:
>
> [ 2092.018902] CPU0: Core temperature above threshold, cpu clock throttled
> (total events = 179101) [ 2092.018903] CPU2: Core temperature above
> threshold, cpu clock throttled (total events = 179101) [ 2092.018906] CPU3:
> Package temperature above threshold, cpu clock throttled (total events =
> 227311) [ 2092.018907] CPU1: Package temperature above threshold, cpu clock
> throttled (total events = 227311) [ 2092.018908] CPU2: Package temperature
> above threshold, cpu clock throttled (total events = 227311) [ 2092.018916]
> CPU0: Package temperature above threshold, cpu clock throttled (total
> events = 227311) [ 2092.019864] CPU0: Core temperature/speed normal
> [ 2092.019865] CPU2: Core temperature/speed normal
> [ 2092.019866] CPU1: Package temperature/speed normal
> [ 2092.019867] CPU3: Package temperature/speed normal
> [ 2092.019868] CPU2: Package temperature/speed normal
> [ 2092.019874] CPU0: Package temperature/speed normal
> [ 2099.655532] mce: [Hardware Error]: Machine check events logged
>
> At the time of crash, syslog contains a bunch of '^@^@^@^@^@^@^@...',
> but nothing useful.
>
> It looks like my cpu clock is being scaled, but perhaps not being scaled
> enough.  I'm guessing the processor halts when I hit 100C.  Again, when
> I leave it well-ventilated it never goes above 99C and everything is
> fine.
>
> Any ideas about where I should look?
>
> Randy

Try cleaning the vents.

Also, most couches have a tendency to compress when something like a laptop is 
on it. Effectively blocking all airflow.

If the temperature goes to 99C when on top of a table, return the laptop to 
the shop as it is clearly not working properly.

--
Joost